TomoScand 3D

The TomoScand3D product shows a volumetric image of electron density in the altitude range of 100-800 km. The product is updated once per 15 min. As input the TomoScand inversion uses dual frequency signals both from Low Earth Orbit satellites (150 and 400 MHz) and from the Global Positioning System (GPS). The network of Beacon receivers contains currently 15 stations in Finland, Norway and Svalbard, which receive signals from the Canadian e-POP instrument and from Russian COSMOS satellites. GNSS signals are received by a set of stations in the EUREF network (c.f. attached plot). A priori information for the inversion is acquired from dynasondes in Tromsø (by the EISCAT Association) and in Kiruna (by Swedish Institute of Space Physics). The reference coordinate system is WGS84. The JSON file contains the coordinates and the reconstructed electron density and also additional information of about the available GNSS stations and satellites used in the reconstruction. The file itself contains additional information and is self-explanatory.